A novel, time controlled, four digit PIN input system with reset function, for multiple security applications, using VHDL and FPGAs

Abstract: A novel, time controlled, four digit PIN input system, suitable for many security applications, was programmed and put in use, for the first time, in this work. The DE10-Lite FPGA board was used here. Administrator has the pro- graming ability of creating PIN1 and PIN2 and setting the time needed for user to correctly create one of the above PINs. User handles FPGA’s SW switches in conjunction with key buttons, in order to achieve the correct creation of one pin, in a few minutes time, also being able to see his creation in seven segment displays. If PIN input is wrong FA (FALSE) is displayed, while at the opposite case all LEDs light up. In the case that user’s time runs out without correct PIN creation, system locks up and administrator must press a third key button connected to FPGA via a pull-down resistance, if he wants to provide user with extra time.

Keywords: PIN input, FPGA, VHDL, time controlled, reset function, security applications.